From: Stephen Stepenuck <sstepenuck**At_Symbol_Here**>
Subject: Re: [DCHAS-L] Peroxide forming compound testing program
Date: Wed, 31 Jan 2018 23:43:40 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: D697FFAE.395C3%sstepenuck**At_Symbol_Here**

It might have been patriarch Jay Young who used to say [paraphrased of course] “If you suspect that a bottle might contain dangerous levels of peroxides, had you not better treat it as if they were/are indeed present?”  I have seen it mentioned that one of the more likely places for peroxides to form could be in the threads of the cap, I.e. removal of the cap for testing could trigger a detonation.   So I think it would be prudent to try to identify any known or suspected old containers early on, and get rid of them.  
After that, by all means ride herd on your current dated inventory via regular checks.
There are time thresholds for testing too.  Once a year might not be adequate for some compounds.  Purity can make a difference too, e.g. some ultrapures would not contain inhibitors commonly present in lower grades of the same stuff.

Good luck.
Stephen J. Stepenuck, Ph.D.
Emeritus professor of chemistry
Keene State College
Keene NH 03435-2001

On 1/31/18, 7:34 AM, ACS Division of Chemical Health and Safety on behalf of Pavlak, Edmund J  wrote:

Does anyone have a testing program in which peroxide forming chemicals are tested?  If so, what methodology are you using?  Do you have a threshold value for disposal, and is it for all peroxide formers or are there different thresholds specific to certain chemicals?


Thanks for your help.


Joe Pavlak


Chemical Management System

Safety and Health Services Division

Brookhaven National Laboratory

Building 120

Upton, NY 11973

631-344-2028 office

631-831-3692 cell


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